Guangbiao, whose fortune is estimated at around £470 million, said: "If we don't start caring for the environment, then after 20 or 30 years our children and grandchildren might be wearing gas mask and carry oxygen tanks.

"2012 did not bring the end of the world but if human beings keep consuming resources, keep polluting the environment, I think Doomsday will arrive.

"I bear witness to the fact that pollution is getting worse and worse."